Facile synthesis and multiple application of ultralong-afterglow room temperature phosphorescence aggregate carbon dots from simple raw materials DOI Creative Commons

Wenping Zhu,

Like Wang, Weijie Yang

et al.

Research Square (Research Square), Journal Year: 2023, Volume and Issue: unknown

Published: Sept. 20, 2023

Abstract Owing to the ultralong afterglow, room temperature decay phosphorescence nanomaterials have aroused enough attention. In work, by simple one-pot solid-state thermal decomposition reaction, aggregate carbon dots (CDs) was prepared from trimesic and boric acid. Based on intermolecular hydrogen bonds intramolecular π-π stacking weak interaction precursors, CDs encapsulated in boron oxide matrix formed aggregation. The state of facilitated triplet excited states (Tn), which could induce properties. By careful investigation, under different excitation wavelengths at 254 nm 365 nm, showed > 15 s 3 emission naked eye, associated with 1516.12 ms 718.62 lifetime respectively. And exhibited widespread application encoding encryption, optical anti-counterfeiting fingerprint identification etc. interesting revealed unexpected ultralong-afterglow properties work opened a window for constructing nanomaterials.

Language: Английский

Recent Advances of Pure Organic Room Temperature Phosphorescence Based on Functional Polymers DOI Creative Commons
Bingbing Ding, Xiang Ma, He Tian

et al.

Accounts of Materials Research, Journal Year: 2023, Volume and Issue: 4(10), P. 827 - 838

Published: Aug. 26, 2023

ConspectusThe phosphorescence is produced by the radiative transition of excited triplet state which generated intersystem crossing (ISC) from singlet state. Compared with fluorescence, it has a longer luminescence lifetime and larger Stokes shift, so phosphorescent materials have great application value in fields such as displays, anticounterfeiting, imaging. But due to low ISC rate organic molecules, slow state, large nonradiative energy loss caused molecular vibration, pure room temperature (RTP) usually difficult obtain. Among most widely used strategies including crystal assembly, polymerization, host–guest encapsulation, polymerization strategy based on rigid polymers achieved success widespread attention their easy processing excellent performance.The main function fix luminophore into matrix suppress transitions oxygen quenching. That is, provide microenvironment necessary for RTP, although some are flexible stretchable. Conventional limited interaction luminophores do not promoting states. Therefore, high RTP quantum yield depends more structural design luminophores. By modification structure, functionalized can be endowed ability regulate levels luminophores, enhance ISC, increase RTP. The selection also enriches diverse properties materials.This Account summarizes latest research progress field polymer-based enhancement polymers. Luminophores construct systems doping, covalent linking, or supramolecular interactions PAA, PMMA, PVA, PAM. To further strengthen polymer rigidity, secondary been successfully employed synergistically nonradioactivation performance, hydrogen bonding bridges, cross-linking. no suppressing but includes enhancing states generating special phenomena. A few specially designed utilize external heavy atom effects, dipole–dipole interactions, electrostatic diffusion promote rate. Due diversification functionalization polymers, were developed various phenomena photoactivation, excitation wavelength dependence, photochromism, circularly polarized stimulus-response. We hope summarized functions development trends helpful guidance designing high-performance materials.

Language: Английский

Citations

84
Engineering Tunable Ratiometric Dual Emission in Single Emitter‐based Amorphous Systems DOI
Hao Sun,

Menglu He,

Glib Baryshnikov

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(10)

Published: Jan. 8, 2024

Molecular emitters with multi-emissive properties are in high demand numerous fields, while these basically depend on specific molecular conformation and packing. For amorphous systems, special arrangement is unnecessary, but it remains challenging to achieve such luminescent behaviors. Herein, we present a general strategy that takes advantage of rigidity S

Language: Английский

Citations

18
Visible‐Light Manipulated Reversible and Ultralong Phosphorescence of Carbon Dots Through Dynamic Cross‐Linking DOI
Tao Zhang, Mei‐Yan Wang,

Lele Liu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(45)

Published: May 29, 2024

Abstract Dynamic organic room‐temperature phosphorescence (RTP) materials are highly promising for various applications. However, developing photo‐responsive RTP systems with simple fabrication, high reversibility, and visible‐light responsiveness presents a significant challenge. Herein, in situ embedding of boron‐doped carbon dots (B‐CDs) amorphous polymer (pPBA) is achieved by two‐step polymerization carbonization process. Impressively, the B‐CDs@pPBA composite exhibits visible‐light‐activated ultralong full reversibility lifetime on–off ratio exceeding 280. By correlating photophysical properties structural characterization results, it concluded that photoinduced intensifying crosslinking between B‐CDs pPBA responsible dynamic RTP. More interestingly, film found to display bending actuation reversible deformable behavior upon light exposure. Finally, potential applications such programmable information storage encryption demonstrated. This research may pave new way development nanomaterials promote their use wide range

Language: Английский

Citations

18
Photo‐Responsive Dynamic Organic Room‐Temperature Phosphorescence Materials Based on a Functional Unit Combination Strategy DOI
Zhiqiang Yang, Haichao Liu, Xiangyu Zhang

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(3)

Published: Oct. 2, 2023

A rational molecular design strategy facilitates the development of a purely organic room-temperature phosphorescence (RTP) material system with precisely regulated luminescence properties, which surely promotes its functional integration and intelligent application. Here, unit combination is proposed to novel RTP molecules combining folding diverse luminescent cores. The different cores are mainly responsible for tunable while contributes spin-orbit coupling (SOC) enhancement, makes as workable building block principle. By this strategy, series color/lifetime-tunable materials achieved unique photo-responsive enhancement when subjected UV irradiation, expands their application scenarios in reusable privacy tags, advanced "4D" encryption, phase separation analysis blended polymers. This work suggests simple effective color lifetime, also provides new options dynamic materials.

Language: Английский

Citations

28
Ultralong sodium alginate-based room temperature phosphorescence materials with advantages of color tunability, flexibility and facile large-area fabrication DOI

Shaochen Sun,

Yan Zhu, Tianyu Li

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 485, P. 149751 - 149751

Published: Feb. 20, 2024

Language: Английский

Citations

11
Color‐Tunable Room‐Temperature Phosphorescence from Non‐Aromatic‐Polymer‐Involved Charge Transfer DOI Creative Commons
Ningyan Li,

Xipeng Yang,

Binbin Wang

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(30)

Published: June 14, 2024

Polymeric room-temperature phosphorescence (RTP) materials especially multicolor RTP systems hold great promise in concrete applications. A key feature these applications is a triplet charge transfer transition. Aromatic electron donors and acceptors are often essential to ensure persistent RTP. There much interest fabricating non-aromatic charge-transfer-mediated it still remains formidable challenge achieve color-tunable via transfer. Herein, material by embedding quinoline derivatives within polymer matrix such as polyacrylamide (PAM) or polyvinyl alcohol (PVA) developed. Through-space (TSCT) achieved upon alkali- heat treatment realize long lifetime of up 629.90 ms, high quantum yield 20.51%, green-to-blue afterglow for more than 20 s at room temperature. This emerges from nonaromatic single phosphor that has rarely been reported before. finding suggests an effective simple approach can deliver new including display, information encryption, gas detection.

Language: Английский

Citations

9
Conformational Effect of Catechol-Terephthalonitrile Emitters Leading to Ambient Violet Phosphorescence DOI

Raktim Deka,

Suvendu S. Dey, Manoj Upadhyay

et al.

The Journal of Physical Chemistry A, Journal Year: 2024, Volume and Issue: 128(3), P. 581 - 589

Published: Jan. 11, 2024

Organic ambient violet phosphorescent (AVP) materials are of great interest due to their involvement high energy and longer-lived triplet excitons. Here, we show three fused ring functionalized donor–acceptor–donor (D–A–D/D–A–D′) emitters (BPT1–BPT3), in which two catechol-based donors (3,4-dihydroxybenzophenone, catechol, or 3,5-ditert-butylcatechol) covalently the terephthalonitrile acceptor via four O–C single bonds. Spectroscopic analysis revealed that all molecules AVP (∼390–394 nm, τAVP = 73–101 μs) with phosphorescence quantum yields (ϕP) 1.8–27.4% low singlet–triplet gaps (0.036–0.046 eV) conformational effects. BPT3 bulky tert-butyl groups increases (ϕP 27.4%). Quantum chemistry calculations reveal flat (F1) twisted (F2) conformers (ground state) a difference (∼4–5 kcal/mol) for molecules; F1 conformer is responsible efficient AVP, while weak blue thermally activated delayed fluorescence components realized from F2 conformer. This approach may provide important clues design high-energy organic materials.

Language: Английский

Citations

8
Organic Chameleon: Fluorescence, Phosphorescence and Radical Afterglow Triple Emission from Naphthylimide Functionalized Triphenylphosphine Derivatives DOI
Meng Tang,

Jingyi Wen,

Yitong Sun

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(21)

Published: Jan. 29, 2024

Abstract Organic radical luminescent materials have attracted worldwide attention because of their absolute spin‐allowed radiative transition and sensitivity to the environment, which give it multiple stimulus response properties. Nowadays, how regulate utilize radicals has become a hot difficult issue. Here, arylphosphonium bromide salts are introduced into molecular backbone naphthimide ( NMI ) using an intramolecular counterion strategy, prepared novel multifunctional stabilized luminescent: TPP‐ o ‐3OMe‐NMI‐Br . Interestingly, this molecule exhibits different assembly modes in solvents, resulting generation two crystals with fluorescence (green: G‐C; orange–yellow: Y‐C), Y‐C crystalline powder excellent stabilization properties for doublet triplet excitons, induce emission orange–yellow afterglow, multi‐stimuli responsiveness external pressure (P), temperature (T) water (W). Moreover, interesting time‐dependent photoactivated colorful afterglow can be observed ‐3OMe‐NMI‐Br@PMMA films doping ratios exhibit multi‐color tunability, responses, data encryption, optical information erase/write behavior. This study not only broadens types applications organic long but also provides new ideas designing “chameleon” field smart luminescence materials.

Language: Английский

Citations

8
Insights into mechanistic interpretation of crystalline-state reddish phosphorescence of non-planar π-conjugated organoboron compounds DOI Creative Commons
Yohei Adachi,

Maho Kurihara,

Kohei Yamada

et al.

Chemical Science, Journal Year: 2024, Volume and Issue: 15(21), P. 8127 - 8136

Published: Jan. 1, 2024

Benzo[ d ]dithieno[ b , f ]borepins exhibited reddish room-temperature phosphorescence (RTP) despite the absence of heavy atoms and oxygen atoms.

Language: Английский

Citations

6
Visualization of Solvent Effect and Oxygen Content via a Red Room-Temperature Phosphorescent Material DOI
Lisha Zhang,

Fan Gu,

Ping Jiang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(32), P. 42794 - 42801

Published: Aug. 1, 2024

The development of pure organic room-temperature phosphorescent (RTP) materials greatly facilitates the integrated application luminescent materials. Herein, a type photoactivated red RTP material was constructed by simply doping 4-(benzo[c][1,2,5]thiadiazol-5-ylthio)benzonitrile (p-NNS) into poly(methyl methacrylate) (PMMA) matrix. obtained film realized controllable photoactivation process regulation diverse solvent levels, demonstrating potential advantages in optical anti-counterfeiting applications. Furthermore, properties doped were utilized to detect oxygen content from 2.00% 4.90%, which revealed exact consumption ambient under UV light. Every CIE point luminescence corresponds certain content, illustrating visualization content. remarkable effect and this work will provide competitive for further

Language: Английский

Citations

4